Google Knowledge Graph: Entity isReference Domains
Proprietary analysis of Google's entity validation patterns across the Knowledge Graph.
⚠️ You Can't Use Just ANY Domain!
Out of 1,738,093 domains we monitor, only 62,202 qualify as isReference domains.
3.65%
Only 3.65% of domains earn isReference status from Google. Domain selection is critical.
Wikipedia is NOT Required (or even your best bet)
Wikipedia: 6 million entities
Kalicube Pro: 71 million entities
Knowledge Graph: 50 billion entities
0.012%
Wikipedia covers only 0.012% of the Knowledge Graph. If your entity isn't in that 0.012%, you need to build a Knowledge Panel with ~30 isReference url instead.
📊 Kalicube's Entity Validation Dataset
💡 Even Small Niche Domains Have isReference Authority
Examples from our dataset (December 2025):
| kalicube.com | 21 entities |
| searchengineland.com | 11 entities |
| jasonbarnard.com | 86 entities |
| searchenginejournal.com | 270 entities |
| entrepreneur.com | 1,292 entities |
| forbes.com | 2,823 entities |
Your niche-specific domains may have similar authority in your category.
Top 100 isReference Domains for All Entity Types
| Rank | Domain | Entity Count |
|---|---|---|
| 1 | wikipedia.org | 422,592 |
| 2 | instagram.com | 141,121 |
| 3 | linkedin.com | 106,933 |
| 4 | x.com | 74,800 |
| 5 | facebook.com | 50,663 |
| 6 | legacy.com | 44,073 |
| 7 | namu.wiki | 35,979 |
| 8 | google.com | 34,223 |
| 9 | youtube.com | 31,112 |
| 10 | britannica.com | 24,586 |
| 11 | reddit.com | 19,751 |
| 12 | dictionary.com | 19,351 |
| 13 | crunchbase.com | 16,678 |
| 14 | amazon.com | 15,736 |
| 15 | fandom.com | 13,321 |
| 16 | microsoft.com | 10,544 |
| 17 | wiktionary.org | 9,935 |
| 18 | letterboxd.com | 9,306 |
| 19 | tiktok.com | 9,020 |
| 20 | rottentomatoes.com | 7,739 |
| 21 | apple.com | 7,686 |
| 22 | yahoo.com | 6,514 |
| 23 | justwatch.com | 6,006 |
| 24 | cambridge.org | 5,839 |
| 25 | imdb.com | 5,676 |
| 26 | shopee.co.id | 5,410 |
| 27 | epicgames.com | 4,862 |
| 28 | hbomax.com | 4,812 |
| 29 | time.is | 4,790 |
| 30 | quora.com | 4,755 |
| 31 | wikiwand.com | 4,683 |
| 32 | espn.com | 4,656 |
| 33 | billboard.com | 4,459 |
| 34 | genius.com | 4,363 |
| 35 | indeed.com | 4,305 |
| 36 | shopee.ph | 4,280 |
| 37 | history.com | 4,063 |
| 38 | github.com | 3,981 |
| 39 | bbc.com | 3,885 |
| 40 | nhl.com | 3,848 |
| 41 | spotify.com | 3,845 |
| 42 | dictionary.net | 3,849 |
| 43 | fifa.com | 3,773 |
| 44 | pornhub.com | 3,769 |
| 45 | independent.co.uk | 3,642 |
| 46 | theguardian.com | 3,629 |
| 47 | forbes.com | 3,585 |
| 48 | vocabulary.com | 3,531 |
| 49 | google.co.il | 3,358 |
| 50 | bing.com | 3,331 |
| 51 | temu.com | 3,310 |
| 52 | reuters.com | 3,162 |
| 53 | deel.com | 3,054 |
| 54 | xhamster.com | 2,991 |
| 55 | eo-paris.fr | 2,915 |
| 56 | bbc.co.uk | 2,850 |
| 57 | amazon.co.uk | 2,838 |
| 58 | nfl.com | 2,837 |
| 59 | inc.com | 2,740 |
| 60 | thesaurus.com | 2,732 |
| 61 | gov.uk | 2,675 |
| 62 | uk.com | 2,672 |
| 63 | goodreads.com | 2,647 |
| 64 | nintendo.com | 2,602 |
| 65 | merriam-webster.com | 2,601 |
| 66 | radiofrance.fr | 2,571 |
| 67 | trustpilot.com | 2,572 |
| 68 | nih.gov | 2,549 |
| 69 | rateyourmusic.com | 2,531 |
| 70 | netflix.com | 2,524 |
| 71 | house.gov | 2,522 |
| 72 | televisionacademy.com | 2,492 |
| 73 | search.google | 2,451 |
| 74 | loc.gov | 2,434 |
| 75 | ca.gov | 2,373 |
| 76 | bloomberg.com | 2,342 |
| 77 | entrepreneur.com | 2,346 |
| 78 | aliexpress.com | 2,340 |
| 79 | playstation.com | 2,327 |
| 80 | amazon.fr | 2,316 |
| 81 | zhihu.com | 2,302 |
| 82 | the-independent.com | 2,305 |
| 83 | stanford.edu | 2,261 |
| 84 | grammy.com | 2,250 |
| 85 | upenn.edu | 2,244 |
| 86 | researchgate.net | 2,243 |
| 87 | ebay.com | 2,226 |
| 88 | pinterest.com | 2,208 |
| 89 | gog.com | 2,192 |
| 90 | one-line.com | 2,193 |
| 91 | soundcloud.com | 2,170 |
| 92 | watch.plex.tv | 2,125 |
| 93 | metacritic.com | 2,125 |
| 94 | nba.com | 2,096 |
| 95 | nature.com | 2,097 |
| 96 | delta.com | 2,094 |
| 97 | itv.com | 2,079 |
| 98 | google.com.br | 2,069 |
| 99 | libri.de | 2,055 |
| 100 | premierleague.com | 2,033 |
| 101+ | 62,102 additional niche-specific domains in full dataset covering 75,125,751 additional entities | |
Why This Data Matters
Google validates entity information through patterns of corroborating mentions across trusted domains. This list shows where Google recognizes all entity types - but here's the catch: entity authority is extremely niche-specific.
Entity Validation at Scale
Google's Knowledge Graph requires consistent entity recognition across validated domains.
- Only 3.65% of domains (62202 out of 1738093) qualify as isReference
- Brands typically need ~30 entity-validated url for a stable Knowledge Panel
- Each niche has unique entity authority patterns
- Generic "authority lists" miss 95%+ of niche-specific opportunities
⚠️ This Free List is Intentionally Limited
The top 100 domains shown above are dominated by massive generalist sites. For 99% of brands, the real opportunities lie in the niche-specific domains that only appear in our full platform dataset.
Recommended Reading:
- How to Get Your Brand in Google's Knowledge Graph Without a Wikipedia Page
- isReference - the key to corporate publisher and person content creator optimization
🔐 Find YOUR Niche-Specific isReference Domains
We monitor 23M+ URLs across 1.7M domains to identify the exclusive 3.65% that qualify as isReference domains for 72M+ entities. The Kalicube Pro platform maps your competitive landscape and identifies your niche-specific opportunities in 15 minutes.
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